"I Do, Adieu" is the fifth season finale of the American television sitcom Cheers, written by Glen and Les Charles and directed by James Burrows. It originally aired on May 7, 1987 on NBC at 9:00pm (Eastern) / 8:00pm (Central). During the fifth season, Sam Malone (Ted Danson) repeatedly proposes to Diane, and she refuses repeatedly until she accepts engagement in "Chambers vs. Malone" (1987). In the previous episode, "A House Is Not a Home", Sam and Diane bought a house together.